Ever since we came to know Rachel Bilson as the delightfully quirky Summer Roberts in The O.C., we have been enamored with her cool Californian style, making her the perfect muse for our latest installment of Seasonal Style. You see, dear readers, it doesn’t matter if Rachel is basking in the summer sun in a breezy white dress, or taking in a chilly winter day in wine-red skinny jeans and chunky ankle boots, she always looks perfectly put together. On that note, whether you are finalizing your summer shopping list, or prepping for winter, you are sure to find plenty of seasonal style tips from Rachel in today’s story! Read on!

SpringIn March, Rachel was spotted out and about in Sherman Oaks wearing a plain raglan top, cuffed denim shorts, and suede ankle boots. While we like this outfit for many reasons, one stands out in particular: it is the perfect outfit for a low-key day. The top and shorts have a relaxed silhouette, which is great if you are running errands and you want to be comfortable. As for the ankle boots, they add a little length to your leg but they are still casual enough if you are running from place to place. To give Rachel’s spring style a try, pick up Alternative Apparel’s Burnout Raglan Tee ($42) and DKNY Jeans’ Missy Striped Shorts ($49). Then, simply add Ash’s Cuffed Suede Ankle Boots ($120)!

SummerLast September, in the dying days of summer, Rachel was spotted out and about in Los Feliz wearing a breezy white sun dress and a pair of flip-flops. We think Rachel’s look is great for a balmy summer day. It has an effortless vibe, because it actually is effortless—this look is really easy to assemble, which is a major boon on sticky summer days! To put together a similarly unfussy ensemble, pick up Rebecca Minkoff’s Deo Dress ($275) or Topshop’s Pleated Strap Dress ($78). If you don’t want to slip into flip-flops, check out Tory Burch’s Emmy Thong Flat Sandals ($195) and Calvin Klein’s Roslyn Flat Sandals ($88)—both pairs will add a fashion-forward element to your look.

FallAs you know, maxi skirts were a major fall trend, so we weren’t surprised to see Rachel giving the trend her own personal spin when she was spotted out and about in Los Angeles last October. As always, Rachel’s outfit stays true to her casually chic aesthetic. By sticking to one statement piece—in this case, a brightly printed maxi skirt—Rachel easily elevates her look from simple to stylish with very little effort. To try a similar look, pick up Torn by Ronny Kobo’s Riley Long Skirt ($176) or Free People’s Cantina Wrap Maxi Skirt ($128) and pair it with J Crew’s Perfect-Fit Tank ($18). Complete your look with Lucky Brand’s Emmie Ballet Flats ($59).

WinterIn February, Rachel was seen running errands in West Hollywood. Her outfit for the day? A pair of burgundy skinny jeans, lace-up ankle boots, a boyfriend blazer, and a printed scarf. We love the way Rachel has mixed and matched colors and prints—this is a fun way to brighten up the cold days of winter! Plus, by utilizing a multitude of layers, Rachel can alter her outfit as the weather allows. To give Rachel’s winter style a spin, pair Topshop’s Shrunken Ruched Sleeve Jacket ($110) with a simple sweater and Distinkt’s Cotton/Cashmere Scarf ($74). Add a pair of Twenty8Twelve’s Edie Skinny Jeans ($67.50) and then finish your look with Rosegold’s Genie Lace-Up Cuffed Booties ($111).

Please note that this post may contain one or more sponsored links. If you happen to shop using these links, Mama’s A Rolling Stone will receive a commission from the store.